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Home My WebLink AboutNC0004685_Permit Issuance_200511044 , 0 °� ®w I 1 r NCDENR �i r Mr. Tim Mathis, Manufacturing Manager PPG Industries Fiber Glass Products, Inc. 940 Washburn Road Shelby, North Carolina 28150 Dear Mr. Mathis: Michael F. Easley Governor William G. Ross, Jr., Secretary North Carolina Department of Environment and Natural Resources Alan W. Klimek, P.E., Director Division of Water Quality November 4, 2005 Subject: Issuance of NPDES Permit NCO004685 ShelbyFacility Cleveland County Division personnel have reviewed and approved your application for renewal of the subject permit. Accordingly, we are forwarding the attached NPDES discharge permit. This permit is issued pursuant to the requirements of North Carolina General Statute 143-215.1 and the Memorandum of Agreement between North Carolina and the U.S. Environmental Protection Agency dated May 9,1994 (or as subsequently amended). This final permit includes following changes from the draft permit sent to you on June 1, 2004: • In the supplement to the permit cover sheet "a chlorine contact tank" was replaced with "an effluent holding tank. Change was done because chlorine is no longer used as a disinfecting agent. • The total lead measurement frequency was changed from 2/month to 1/month to correct an error. • The daily maximum TSS limit was changed from 30 mg/L to 146 mg/L to correct an error. • The pH effluent limitations language was changed to "=6.0 to d" to be consistent with the previous permit. The Division has reviewed your request for a revision of the Oil and Grease limit. The request cannot be granted. Review of the Oil and Grease effluent data indicates that since February 2001 when the new analytical procedure became effective only 2 violations of the Oil and Grease limit have occurred. The vast majority of the measurements were below detection levels. In order to change the limit, you will need to conduct a side -by -side method comparison in accordance with the procedure described in the Section 2 of the document "Analytical Method Guidance for EPA Method 1664A Implementation and Use (40 C FR Part 136), February 2000" and submit results to the Division. The Division cannot grant your request to reduce the monitoring frequency for BOD and NHr from weekly to 2/month. Your facility is classified as a Class III facility and the current monitoring frequency for oxygen consuming substances for your facility reflects a reduction in the standard monitoring frequency of 3/week for Class III facilities. In addition, both BOD and NH, are major operational parameters that N. C. Division of Water Quality / NPDES Unit Phone: (919) 733.5083 1617 Mail Service Center, Raleigh, NC 27699-1617 fax: (919) 733-0719 Internet: h2o.enr.state.nc.us DENR Customer Service Center 1800 623-7748 indicate effectiveness of treatment system operation and should be monitored frequently to prevent deficiencies and limit violations and assure protection of the water quality in the receiving stream. The Division is also unable to grant your request for adding the following statement to the effluent page for Outfall 002: "Monitoring is required only when non -contact cooling water is discharged to outfall 002". The Outfall 002 is a non -contact cooling water outfall and is permitted in accordance with the general permit for non -contact cooling water. Provisions in the General Permit for non -contact cooling water do not allow the modification you have requested. If any parts, measurement frequencies or sampling requirements contained in this permit are unacceptable to you, you have the right to an adjudicatory hearing upon written request within thirty (30) days following receipt of this letter. This request must be in the form of a written petition, conforming to Chapter 150B of the North Carolina General Statutes, and filed with the Office of Administrative Hearings (6714 Mail Service Center, Raleigh, North Carolina 27699-6714). Unless such demand is made, this decision shall be final and binding. Please note that this permit is not transferable except after notice to the Division. The Division may require modification or revocation and reissuance of the pemrit. Ibis permit does not affect the legal requirements to obtain other permits which may be required by the Division of Water Quality or permits required by the Division of Land Resources, the Coastal Area Management Act or any other Federal or Local governmental permit that may be required. If you have any questions concerning this permit, please contact Sergei Chemikov at telephone number (919) 733-5083, extension 594. Sincerely, fvr- AlanW. Klimek, P.E. cc: 1VPDES files Central Files Mooresville Regional Office / Surface Water Protection Aquatic ToxicoloUUnit Roosevelt Childress, EPA Region 4 Permit NC0004685 STATE OF NORTH CAROLINA DEPARTMENT OF ENVIRONMENT AND NATURAL RESOURCES DIVISION OF WATER QUALITY PERMIT TO DISCHARGE WASTEWATER UNDER THE NATIONAL POLLUTANT DISCHARGE ELIMINATION SYSTEM In compliance with the provisions of North Carolina General Statute 143-215.1, other lawful standards and regulations promulgated and adopted by the North Carolina Environmental Management Commission, and the Federal Water Pollution Control Act, as amended, PPG Industries Fiber Glass Products, Incorporated is hereby authorized to discharge wastewater and stormwater from a facility located at Shelby Facility On NCSR 1313 West of Shelby Cleveland County to receiving waters designated as Brushy Creek and Overflow Branch in the Broad River Basin in accordance with effluent limitations, monitoring requirements, and other conditions set forth in Parts I, II, 11I, and IV hereof. The permit shall become effective December 1, 2005. This permit and the authorization to discharge shall expire at midnight on August 31, 2008. Signed this day November 4, 2005. Alan W. Mimek, P.E., Director Division of Water Quality By Authority of the Environmental Management Commission Permit NC0004685 SUPPLEMENT TO PERMIT COVER SHEET All previous NPDES Permits issued to this facility, whether for operation or discharge are hereby revoked, and as of this issuance, any previously issued permit bearing this number is no longer effective. Therefore, the exclusive authority to operate and discharge from this facility arises under the permit conditions, requirements, terms, and provisions included herein. PPG Industries Fiber Glass Products, Incorporated is hereby authorized to: Continue operation of a 1.3 MGD wastewater treatment facility consisting of: • an overflow/storage basin; • bar screen and grinder; • an influent wet well with lime addition; • influent pumps; • a surge tank; • an equalization tank; • a flash mix tank with aluminum chloride addition; • coagulant and polymer addition; • two primary clarifiers; • two aeration basins with bentonite clay addition; • a splitter box and floc tank; • three secondary clarifiers with ferric chloride addition; • a sand filter; • an effluent holding tank, • a sludge thickener tank; and • a sludge belt press. These treatment works are located at PPG's Shelby facility on NCSR 1313, west of Shelby, Cleveland County and discharge treated process wastewater, stormwater, sanitary sewage, cooling water, and landfill leachate, at the location specified on the attached map, through outfall 001 into Brushy Creek, a class C water in the Broad River Basin; and 2. Discharge non -contact cooling water and stormwater through outfall 002, at the location specified on the attached map, into Overflow Branch, a class C water in the Broad River Basin. / � f' 1.-, i� t 1 i ��r.,<{' �. P7P '.. '.•�~ '��li I S,=%'}f Kmgs s„ / /�/^�/j �t�,l it 1�1��` �� y ffr �'�y�. � � � '�••• i. � Outfa11001 to Brushy Creek ff Latitude: 35120'25" i Longitude 81°3658 IJ 1 / f r r J;. PN lots J L Outfall 002 to Overflow Branch /A. + S' Latitude: 35019'27" Longitude 81037 50"-67 - wyp ham c_. �;; t ; - � � .A _ Y • �' Av �[v s � '- y • /� Sri lk Ate i ��.=�J it'r•-i "�+`'�r ,9.<ti�� `Ci+R�I<i�h, �1�', P:6 • i4N1, u< � i� t � �rae_,.. � P¢�,.'��~ L PPG Industries. - NC0004685 Facility Location USGS Quad Name: Shelby SE/SW Receiving Stream: See Above Stream Class: C NOii"fi1 Not to SCALE Subbasin: Broad - 030804 Permit NC0004685 Part I. Section A 1. EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS Beginning on the effective date of this permit and lasting until permit expiration, the Permittee is authorized to discharge from Outfall 001. Such discharges shall be limited and monitored by the Permittee as specified below: PARAMETER EFFLUENT LIMITATIONS MONITORING RE UIREMENTS Monthly Average Daily Maximum Measurement Frequency Sample a Sample Location' Flow (MGD) 1.3 Continuous Recording I or E BOD, 5-day, 20oC (mass) 217.0 lbs/day 325.5 lbs/day Weekly Composite E BOD, 5-day, 200C (cone.) 20.0 mg/L 30.0 mg/L Weekly Composite E Total Suspended Solids 20.0 mg/L 146.0 mg/L Weekly Composite E NH3-N (mass) 65.0 lbs/day 97.5lbs/day Weekly Composite E NH3-N (cone.) 6.0 mg/L 9.0 mg/L Weekly Composite E Dissolved Oxygen Daily Average Z5.0 mg/L Daily Grab E Dissolved Oxygen (instream) Monitor & Report See Note 1 Grab U,D pH Z6.0 to 59.0 Standard Units Daily Grab E Temperature, ^C Daily Grab E Temperature, ^C (instream) See Note 1 Grab U,D Fecal Coliform Weekly Grab E Total Nitrogen Quarterly Composite E Total Phosphorus Quarterly Composite E Conductivity See Note 1 Grab U,D Oil and Grease 10.0 mg/L 15.0 mg/L Weekly Grab E Total Lead Monthly Composite E Fluoride 5.4 mg/L Weekly Composite E Total Zinc 2/Month Composite E Total Copper 2/Month Composite E Chloride 2/Month Composite E Total Residual Chlorine2 17 pg/L Weekly Grab E Chronic Toxicity3 Quarterly Composite E NOTES: 1 E - Effluent, I - Influent, U - Upstream at NCSR 1323, D - Downstream at NCSR 1305; upstream and downstream samples shall be grab samples collected three times per week during June. July, August, and September and weekly during the remainder of the year. 2 The Imitation for TRC becomes effective 18 months from the effective date of this pewit. Monitoring and effluent limitation for TRC apply only if chlorine is added for disinfection. 3 Chronic Toxicity (Ceriodaphnia) P/F 0 33%: January, April, July, October. See Part I, A. 3 of this permit. THERE SHALL BE NO DISCHARGE OF FLOATING SOLIDS OR VISBLE FOAM IN OTHER THAN TRACE AMOUN s. Permit NC0004685 Part I. Section A 2. EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS Beginning on the effective date of this permit and lasting until permit expiration, the Permittee is authorized to discharge from Outfall002. Such discharges shall be limited and monitored by the Permittee as specified below: PARAMETER EFFLUENT LIMITATIONS MONITORING REQQUMIREMENTS Monthly Aver a Daily Maximum Measurement Fre uenc Sample Type Sample Location Flow (MGD) Semi -Annually Estimate Effluent Temperature See Note 1 Semi -Annually Grab Effluent Total Residual Chlorine2 28 pg/L Semi -Annually Grab Effluent pH Between 6.0 and 9.0 Standard Units Semi -Annually Grab Effluent NOTES: 1 The temperature of the effluent shall be such as not to cause an increase In the temperature of the receiving stream of more than 2.8"C and in no case cause the ambient water temperature to exceed 290C. 2 The effluent limitation for chlorine shall become effective 18 months after the effective date of this permit. THERE SHALL BE NO DISCHARGE OF FLOATING SOLIDS OR VISIBLE FOAM IN OTHER THAN TRACE AMOUNTS. THE PERMnTEE SHALL OBTAIN AunioRizAmON FROM THE DIVISION OF WATER QUALITY PRIOR TO UTILIZING ANY BIOCIDE IN THE COOLING WATER - SEE PART 1, A. 4 OF THIS PERMIT. THERE SHALL BE NO CHROMIUM, ZINC, OR COPPER ADDED TO THE COOLING WATER. Permit NC0004685 Part I. Section A 3. CHRONIC TOXICITY PERMIT LIMIT (QUARTERLY) — OUTFALL 001 The effluent discharge shall at no time exhibit observable inhibition of reproduction or significant mortality to Ceriodaphnia dubia at an effluent concentration of 33%. The permit holder shall perform at a minimum, quarterly monitoring using test procedures outlined in the "North Carolina Ceriodaphnia Chronic Effluent Bioassay Procedure," Revised February 1998, or subsequent versions or "North Carolina Phase II Chronic Whole Effluent Toxicity Test Procedure" (Revised -February 1998) or subsequent versions. The tests will be performed during the months of January. April. July, and October. Effluent sampling for this testing shall be performed at the NPDES permitted final effluent discharge below all treatment processes. If the test procedure performed as the first test of any single quarter results in a failure or ChV below the permit limit, then multiple -concentration testing shall be performed at a minimum, in each of the two following months as described in "North Carolina Phase 11 Chronic Whole Effluent Toxicity Test Procedure" (Revised -February 1998) or subsequent versions. The chronic value for multiple concentration tests will be determined using the geometric mean of the highest concentration having no detectable impairment of reproduction or survival and the lowest concentration that does have a detectable impairment of reproduction or survival. The definition of "detectable impairment," collection methods, exposure regimes, and further statistical methods are specified in the "North Carolina Phase II Chronic Whole Effluent Toxicity Test Procedure" (Revised -February 1998) or subsequent versions. All toxicity testing results required as part of this permit condition will be entered on the Effluent Discharge Monitoring Form (MR-1) for the months in which tests were performed, using the parameter code TGP3B for the pass/fail results and THP3B for the Chronic Value. Additionally, DWQ Form AT-3 (original) is to be sent to the following address: Attention: Environmental Sciences Branch North Carolina Division of Water Quality 1621 Mail Service Center Raleigh, North Carolina 27699-1621 Completed Aquatic Toxicity Test Fors shall be filed with the Environmental Sciences Branch no later than 30 days after the end of the reporting period for which the report is made. Test data shall be complete, accurate, include all supporting chemical/physical measurements and all concentration/response data. and be certified by laboratory supervisor and ORC or approved designate signature. Total residual chlorine of the effluent toxicity sample must be measured and reported if chlorine is employed for disinfection of the waste stream. Should there be no discharge of flow from the facility dung a month in which toxicity monitoring Is required, the permittee will complete the information located at the top of the aquatic toxicity (AT) test for indicating the facility name, permit number, pipe number, county, and the month/year of the report with the notation of "No Flow" in the comment area of the for. The report shall be submitted to the Environmental Sciences Branch at the address cited above. Should the permittee fail to monitor during a month in which toxicity monitoring is required, monitoring will be required during the following month. Should any test data from this monitoring requirement or tests performed by the North Carolina Division of Water Quality indicate potential impacts to the receiving stream, this permit may be re -opened and modified to include alternate monitoring requirements or limits. NOTE: Failure to achieve test conditions as specified in the cited document, such as minimum control organism survival, minimum control organism reproduction, and appropriate environmental controls, shall constitute an invalid test and will require immediate follow-up testing to be completed no later than the last day of the month following the month of the initial monitoring. Permit NC0004685 Part I. Section A 4. BIOCIDE CONDITION The Permittee shall not use any biocides except those approved in conjunction with the permit application. The Permittee shall notify the Director in writing not later than ninety (90) days prior to instituting use of any additional biocide used in cooling systems which may be toxic to aquatic life other than those previously reported to the Division of Water Quality. Such notification shall include completion of Biocide Worksheet Form 101 and a map locating the discharge point and receiving stream. 5. DISINFECTION CONDITION — OUTFALL 001 In the event that violations of North Carolina's water quality standards for fecal coliform occur as a result of this discharge, disinfection will immediately be required and the permit amended to establish a fecal coliform effluent limitation. Ja`(fo sr" m A �w UNITED STATES ENVIRONMENTAL PROTECTION AGENCY Awl REGION 4 $ ATLANTA FEDERAL CENTER P \oe 61 FORSYTH STREET tits PpdtE�l ATLANTA, GEORGIA 30303-6960 J,QR 0 8 2004 Mr. Mark McIntire North Carolina Department of Environment and Natural Resources Division of Water Quality NPDES Unit 1617 Mail Service Center Raleigh, NC 27699-1617 SUBJ: Draft NPDES Permit PPG - Shelby Facility Permit No. NC0004685 Dear Mr. McIntire: �EA J U N 10 2004 DENR - WATFR Bt1Al rry In accordance with the EPA/NCDENR MOA, we have completed review of the draft permit referenced above and have no comments. We request that we be afforded an additional review opportunity only if significant changes are made to the draft permit prior to issuance or if significant comments objecting to it are received. Otherwise, please send us one copy of the final permit when issued. Sincerely, Marshall Hyatt, Environmental Scientist Permits, Grants, and Technical Assistance Branch Water Management Division Intemet Address (URL) • http://www.epa.gov Recycled/Recyclable . Pnnled Whh Vegelable ON Based Inks on Recycled Paper (Minimum 30"L Poslconsumer) DENR/DW$ FACT SHEET FOR NPDES PERMIT DEVELOPMENT NPDES No. NC0004685 Facility Information Applicant/Facility Name: PPG Industries Fiber Glass Products, Inc. Applicant Address: 940 Washburn Switch Road, Shelby, NC Facility Address: 940 Washburn Switch Road, Shelby, NC Permitted Flow 1.3 MGD Type of Waste: 95% Industrial, 5% Domestic Facility/Permit Status: Existing renewal without expansion County: Cleveland Stream Characteristics Receiving Stream Brushy Creek (001) and Overflow Branch (002) 303(d) Listed? No Stream Classification C Sub -basin 03-08-04 Drainage Area (m12): 15.1 Summer 7Q10 (cfs) 4.0 Winter 7Q10 (cfs): 7.6 Average Flow (cfs): 21.0 WC (%) @ 3.0 MGD: 133 Miscellaneous Regional Office: Mooresville USGS Topo Quad: F12SE Permit Writer: Mark McIntire Date June 1, 2004 1.0 Proposed Changes Addition of total residual chlorine limits for both outfalls with an 18 month schedule of compliance. Removal of instream fecal coliform monitoring. Monitoring frequency for lead has been reduced from 2/month to monthly. 2.0 Background PPG Industries Fiber Glass Products, Inc. operates a fiberglass fiber manufacturing facility in Shelby, NC. The Shelby plant currently concentrates the bulk of its fiberglass manufacturing on the reinforced plastics market. Manufacturing begins with glass raw materials including limestone, silica, boron, clay and fluorspar. These raw materials are blended in powder form and added to melt furnaces. The batch melt furnaces, operating at 2800°F, transform the batch into molten glass. The molten glass is then drawn from the furnaces through electrically heated platinum bushings into continuous fibers. These fibers are gathered into strands and either spooled or chopped into specified lengths. Water sprays cool the glass and keep strand contact points clean during the winding process. A "binder", which is water based, is applied to the individual fibers as they are drawn from the furnaces before being gathered into strands. The binder is a proprietary mixture of resins, film formers, lubricants, surfactants and coupling agents emulsified in a water base. The majority of the wastewater treated by the treatment plant is spray water, lost binder and cleaning water. PPG hidastries Fact Sheet NPDES Renewal Page 1 Additional wastewater is received from Azdel, Inc. Azdel is a PPG joint venture with GE and produces a fiber glass reinforced polypropylene sheet material that is sold to molders. This is considered a plastics laminating process and is cover under 40 CFR 463. The manufacturing process is dry, so that the wastewater sent to PPG is either cooling water, cleaning water or domestic wastewater. Therefore, no allocation based on 463 is proposed. 3. Wasteload Allocation S This permit was first issued on May 31, 1978. The permit was summarily adjudicated. It is not entirely evident why the permit was adjudicated, however a review of historical files seems to indicate that the adjudication was filed because of a disagreement with limit development. At issuance, final effluent limitations were based on 40 CFR 410.32, Subpart C: Textile Dry Processing. Whfle the permit was being adjudicated, interim limits were established based on the results of a fleld calibrated water quality model. Upon resolution of the adjudication (it was determined that textile guidelines did not apply to PPG's discharge), the permit was reissued in August of 1979 with water -quality limitations based on the results of the model. This original series of wasteload allocations was based on a discharge flow of 0.875 MGD. The permit was renewed in 1985 with a change in allocation, however the reason for the change is not evidenced in the flies. In 1988, Jackie Nowell completed a wasteload allocation for this facility at an expanded flow of 1.3 MGD. The increase in flow was based on process modifications in the manufacturing facility. Jackie evaluated PPG's discharge with a level B model and developed appropriate water quality -based limitations for BOD5 and NH3-N. The current effluent limitations for BOD5 and NH3-N are based on the level B model run in 1988, while the current TSS limits are BPJ, apparently based on the BOD5 limits developed as resolution to the 1978/79 adjudication. Extensive research was conducted during the previous renewal process to determine if any federal guidelines exist for such a manufacturing operation. Lacy Ballard of PPG was contacted for a detailed description of the manufacturing process and associated end products. Don Anderson and Hugh Wise were contacted at EPA in D.C. regarding the applicability of textile and glass guidelines. After conversations with both, it was determined that neither set of guidelines applies to PPG's process. As stated earlier, PPG does accept wastewater from Azdel, Inc. Azdel's operation falls under the authority of 40 CFR 463, Plastics Laminating. However, manufacturing at Azdel is a dry process. Azdel's wastewater is largely cooling water, cleaning water and domestic wastewater. Therefore, guidelines do not apply to this aspect of PPG's effluent either. PPG operates two outfalls, 001 and 002. Outfan 001 Outfall 001 is the effluent from the wastewater treatment plant and receives the following kinds of wastewater: • Sanitary • Research • Boilers • Miscellaneous • Forming • Fabrication • Coating • Process WW • Storm drains/garage pads • Azdel, Inc. W W Outfall 002 Outfall 002 is a non -contact cooling water outfall and is permitted in accordance with the general permit for non -contact cooling water. PPG Industries Fact Sheet NPDES Renewal Page 2 Reasonable potential analyses were conducted for lead, copper, zinc, and fluoride for outfall 001. While the maximum predicted concentration for copper and zinc exceeded the allowable concentration, no limits are proposed as the facility is not experiencing whole effluent toxicity. The monitoring frequency for lead has been reduced from 2/month to monthly because of a single detection in 2 years worth of sampling. 4.0 Compliance Summary A review of DMR data has indicated that compliance with permit conditions is excellent. While the facility had a history of toxicity failures prior to 1996, installation of bentonite addition facilities in 1998 appear to have fixed the problem. The facility has passed all whole effluent toxicity tests since at least January 2000. 5.0 Instream Monitoring Requirements PPG currently monitors dissolved oxygen, fecal coliform, temperature and conductivity instream. This renewal recommends maintaining instream monitoring for DO, temperature, and conductivity. As this stream is not 303(d) listed for fecal coliform, current strategy recommends removal of instream monitoring for such. 6.0 Proposed Schedule for Permit Issuance Draft Permit to Public Notice: June 1, 2004 Permit Scheduled to Issue: July 26, 2004 7.0 State Contact If you have any questions regarding any of the above information or the attached permit, please contact Sergei Chernikov at (919) 733-5038 ext. 594. CHANGES TO THE FINAL PERMIT: • In the supplement to permit cover sheet "a chlorine contact tank" was replaced with "an effluent holding tank. Change was done because chlorine is no longer used as a disinfecting agent. • The total lead measurement frequency was changed from 2/month to 1/month to correct an error. • The daily maximum TSS limit was changed from 30 mg/L to 146 mg/L to correct an error. • The monitoring frequency for BOD was changed from weekly to 2/month based on the review of the effluent data and a response to the permittee request. • The monitoring frequency for NH3 was changed from weekly to 2/month based on the review of the effluent data and a response to the permittee request. • The pH effluent limitations language was changed to ">6.0 to <9" to be consistent with the previous permit. PPG Industries Fact Sheet NPDES Renewal Page 3 12 PPG Industries Fiber Glass Products, Inc. Todd Winn Associate Engineer, Environmental Fiber Glass Products July 1, 2004 Via Certified Mail —Return Receipt Requested Mr. Mark D. McIntire, P.E. NPDES Unit 1617 Mail Service Center Raleigh, NC 27699-1617 940 Washburn Switch Road Shelby, NC 28150 704-434-2261 ext. 359 Fax 704-434-0792 twMrv@ppg com' D] LEJJ 7 2004 ____] DENR - WAfER QUALITY POINT SOURCE BRANCH Subject: Comments on Draft NPDES Wastewater Permit NC0004685 PPG Industries Fiber Glass Products, Inc. — Shelby Facility Dear Mr. McIntire: Thank you for the opportunity to review and comment on our draft NPDES permit dated June 1, 2004, received June 9, 2004. We are requesting that the following changes he made to the permit: fiver Letter Replace J.T. Scruggs with Tim Mathis. Tim Mathis replaced J.T. Scruggs as the Manufacturing Manager. ✓Supplement To Permit Cover Sheet Replace "a chlorine contact basin" with "an effluent holding tank" Chlorine is no longer used as a disinfecting agent. 'Part I. Section A 1. — Total Lead Measurement Frequency The total lead measurement frequency should be changed from 2/month to 1/month to reflect the change made in measurement frequency as stated in the permit's cover letter. i Part I. Section A 1. — Total Suspended Solids Daily Maximum Limit The daily maximum TSS limit should be changed from 30.0 mg/L to 146 mg/L. The previous permit limit was 146 mg/L art I. Section A 1. — BOD Daily Measurement Frequency We request that the measurement frequency for BOD be changed from once per week to 2/month. As listed in the permit application, of the 53 samples taken, the maximum was 7.6 mg/L versus the limit of 20.0 mg/L. The average of these 53 samples was only 1.6 mg/L. Based upon this data, monitoring 2/month would yield sufficient sampling data to ensure compliance with permitted limits. art L Section A 1. -NH, Daily Measurement Freauencv We request that the measurement frequency for NH3 be changed from once per week to 2/month. As listed in the permit application, for 53 samples collected per the current permit requirements, the maximum NH3 was 1.40 mg/L versus the limit of 6.0 mg/L and the average was only 0.28 mg/L. Based upon this data, monitoring 2/month would yield sufficient sampling data to ensure compliance with permitted limits. att 1. Section A. 1. - pH Effluent Limitations Language We request that the pH effluent limitations language be changed from "Between 6.0 and 9.0 Standard Units" to ">6.0 to 59.0 Standard Units", as described in the previous permit. �1 Part 1. Section A. 1. Oil & Grease Effluent Limitations I PPG requests a revision in the oil and grease limits based on changes mandated in associated analytical procedures. Oil and grease limits were previously based on EPA Method 413.1 analysis (freon extraction). The state of North Carolina and U.S. EPA will no longer allow this method for oil and grease testing. The EPA Method 413.1 is being replaced completely by EPA Method 1664 (hexane extraction). The current Method 1664 extracts a wider range of substances than the former freon method and therefore yields a greater oil and grease result. PPG requests that its oil and grease permit limits be adjusted to reflect the increase in results attributable to the change from freon to hexane extraction of samples. Per EPA guidance document "Analytical Method Guidance for EPA Method 1664A Implementation and Use (40 CFR part 136), February 2000" a split sample study by PPG Shelby was conducted and yielded results that were an average of 10 fold greater when extracted by Method 1664 (hexane) versus Method 413.1 (freon). Therefore, PPG requests a comparable 10-fold increase in the limits as follows: Change the Oil & Grease monthly average from 10 mg/L to 100 mg/L. Change the Oil & Grease daily maximum from 15 mg/L to 150 mg/L. A summary of the data and additional discussion of the two methods is in Attachment 1. Please note that impacts from the change in test methods were previously discussed at length with NC DENR DWQ beginning in 1998 and on June 5, 2000 PPG requested a permit modification to allow use of a modified Method 1664, with a silica gel filtering step, to eliminate the interferences. Since permission to modify the method to eliminate the interference was not granted, PPG requests that the limits be adjusted as described above, to account for the presence of these Method 1664 interferences that contribute to a higher oil and grease result. r D Part 1. Section A. 2. - Monitoring Requirements We request that a footnote be added that states: "Monitoring is required only when non -contact cooling water is discharged to outfall 002." Sincerely,, Todd Winn Environmental Engineer w/ attachment Cc: WWTP P. Pride - Lexington File Attachment l SUMMARY OF DATA ON PARALLEL TESTS WITH ELEVATED HEXANE OIL AND GREASE CONCENTRATIONS Test PPG Shelby Oil and Grease m A Ratio of Results Hexane versus Freon Hexane Extraction Method 1664 Freon Extraction Method 413.1 12/21/99 11.0 2.6 4.2 1/19/00 49.0 1.8 27.2 2/16/00 11.0 7.3 1.5 3/22/00 1 28.0 3.5 1 8.0 Average 10.2 Beginning in 1998, analytical laboratories switched to oil and grease analysis Method 1664 (hexane extraction) due to phase -out of the freon extraction solvent previously used in Method 413.1. PPG Shelby initiated discussions with NC DENR DWQ to address the increases in results observed with the new Method 1664. The above results summarize a study of split samples collected by PPG Shelby between December 1, 1999 and April 2, 2000. - There are significant differences between the analytical procedures. Both EPA Methods 413.1 and 1664 were developed for the determination of relatively non- volatile hydrocarbons, vegetable oils, animal fats, waxes, soaps, greases, and related materials, commonly referred to as total oil and grease. Under EPA Method 413.1, the freon-extracted constituents were referred to as "oil and grease". Under EPA Method 1664, the hexane -extracted constituents are referred to as "bexane extractable material', indicating that Method 1664 measures not only oil and grease, but any material that can be extracted using hexane. Method 1664 can therefore yield greater results than Method 413.1 because hexane extracts a wider range of materials than those formerly extracted by freon. Surfactants appear to be more readily extracted by hexane than freon, causing higher results in Method 1664 as compared to Method 413.1. The hexane extraction is prone to formation of emulsions and floats which can increase the test results. PPG -Shelby has experienced these problems with the Method 1664 analysis. The above data for split samples indicate that oil and grease results using hexane extraction can be significantly greater than oil and grease results obtained from the freon extraction. THE STAR June 11, 2004 NCDENR/DWO/NPDES 1617 MAIL SERVICE CENTER RALEIGH NC 27699-1617 ATTN: CAROLYN BRYANT PIBLIC NOTICE CLEVELAND COUNTY I, Tina Mc Combs, Classified Advertising Manager at THE STAR, a newspaper published in Shelby, N. C., do solemnly swear that the advertisement hereto annexed appeared in the SHELBY STAR, for one seccessive week/days beginning jQNE 06, 2004 _ nA Classified Advertising Manager Sworn to and subscribed before me on this the 11TH day of JUNE, 2004 I ► C i1t-t-I -Anw— t ck1 nos_ o ry Public Off/ �rnmi-a5iarl �Qi✓�S /a��8' :;;mmG6reamflY�a� - I PUBLIC NOTICE STATE OF NORTH CAROLINA ENVIRONMENTAL MANAGEMENT COMMISSION/ NPDES UNIT 1617 MAIL SERVICE CENTER, RALEIGH, NC 27699.1617 NOTIFICATION OF INTENTTO ISSUE A NPDES WASTEWATER PERMIT On the basis of thorough staff review and application of NO General Statute 143.21, Public law 92-500 and other lawfulstandards and regulations, the North Carolina Environmental Management Commission proposes to issue a Nation- al Pollutant Discharge Elimination System (NPDES) wastewater dls- charge permit to the per- son(s) listed below effective 45 days from the publish data of this notice. Written comments regard- Ing the proposed permit will be accepted until 30 days attar the publish date of this notice. All comments re- ceived prior to that date are considered In the final de- terminations regarding the proposed permit. The Di- rector of the NO Division of Water Quality may decide to hold a public meeting for the proposed permit should the Division receive a sig- ndicant degree of public in- terest. Copies of the draft permit and other supporting infor- matics on file used to de- termine conditions present in the draft permit are available upon request and payment of the costs of re- production. Mail comments y and/or requests for infor- mation to the NC Division . of Water Quality at the above address or call Ms. Votary Stephen$ at (919) 733-5083, extension 520. Please indicate the NPDES permit number (attached) in any communication. Inter- ested persons may also visit the Division of Water Quality at 512 N. Salisbury Street, Raleigh, NC 27604-1148 between the hours of 8:00 a.m. and 5:00 PA. to review infonnatlon on file. PPG Industries Fiber Glass Al Products, Inc. has applied for renewal of the NPDES permit for its Shelby facility (NC00 t).The facility Is permitted1.3 to discharge uF fluent 1.t from of treated OF fluent from outlall 001 to Brushy Creek, and non -contact cooling water from outall 002 to Overflow Branch. Both receiving streams are class C watere in the Broad River Basin, BOD, ammonia, and fluo- ride are water quality limit- ed. This discharge may im- pact future allocation of the receiving streams. June 6, 2004 tic SOC Priority Project: No To: NPDES Unit Water Quality Section Attention: Charles Weaver Date: July 30, 2003 NPDES STAFF REPORT AND RECOMMENDATION MRO No.: 03-09 County: Cleveland pn Permit No. NC0004685 IE U D PART I - GENERAL INFORMATION AUG - 5 � 1. Facility and address: PPG Industries, Inc. DENR-%CATER OUA�IN 940 Washburn Switch Road POINT SOURCE BRANGII Shelby, North Carolina 28150 2. Date of investigation: June 18, 2003 3. Report prepared by: Michael L. Parker, Environmental Engineer II 4. Persons contacted and telephone number: Todd Winn, (704) 434-2261, ext. 359. 5. Directions to site: From the intersection of US Hwy 74 and SR 1313 (Washburn Switch Road) just west of the City of Shelby, travel north on SR 1313 approximately 3.0 miles. The PPG plant is located on the left side of the road. 6. Discharge point(s), list for all discharge points: Outfall 001: Latitude: 35° 20' 43" Longitude: 81° 37' 02" Outfall 002: Latitude: 35' 19' 28" Longitude: 81' 37' 51" Attach a USGS map extract and indicate treatment facility site and discharge point on map. WWTP: U.S.G.S. Quad No.: F12SW U.S.G.S. Quad Name: Boiling Springs North, NC Discharge point: U.S.G.S. Quad No.: F12SE U.S.G.S. Quad Name: Shelby, NC 7. Site size and expansion area are consistent with application? Yes. There is ample area for additional WWTP construction, if necessary. Page Two 8. Topography (relationship to flood plain included): Flat to moderate slopes; the WWTP is not located within a 100-year flood plain. 9. Location of nearest dwelling: None within 500 feet of the plant 10. Receiving stream or affected surface waters: Brushy Creek (outfall 001), Overflow Branch (outfall 002) a. Classification: C (both receiving streams) b. River Basin and Subbasin No.: Broad 030804 C. Describe receiving stream features and pertinent downstream uses: Brushy Creek is of moderate size (15-25 feet wide) with a sandy bottom. General "C" classification uses downstream. Overflow Branch is - 3 - 4 feet wide, and downstream uses are primarily agricultural in nature. Imo\t71rlSA YIf,7JyY_[1L[1]_�7f.Y1 MIT11A - 111109:1X1VYu111&&AU M11 a. Volume of wastewater to be permitted: 1.3 MGD (outfall 001), Flow is intermittent at outfall 002. b. Current permitted capacity of the wastewater treatment facility: 1.3 MGD C. Actual treatment capacity of the current facility (current design capacity): 1.3 MGD d. Date(s) and construction activities allowed by previous Authorizations to Construct issued in the previous two years: There have been no ATCs issued in the past 2 years, however, this facility was authorized to conduct a pilot testing program where treated effluent was recycled back through the facility for use as non -contact cooling water (see Part IV). e. Please provide a description of existing or substantially constructed wastewater treatment facilities: Existing treatment facilities consists of an influent overflow/storage basin, influent screening with grinder, wet well with lime addition, a surge tank, an equalization tank, a flash mix tank for aluminum chloride, coagulant and polymer addition, two (2) primary clarifiers, two (2) aeration basins with diffused air and bentonite clay addition, a floc tank with ferric chloride addition, three (3) secondary clarifiers with ferric chloride addition, a chlorine contact tank being used as an effluent pump tank (no chlorine is added at this time), traveling bridge sand filter, defoamer addition, gravity sludge thickener, belt filter press, and an overflow lagoon. Stand-by power is provided for the industrial process and the WWTP through on -site generators. The permittee has received approval from the Division to use of bentonite clay for effluent toxicity reduction and the addition of aluminum chloride as a reactant for fluoride removal, chemical precipitation, and floc formation. There is no treatment provided at outfall 002. Please provide a description of proposed wastewater treatment facilities: There are no proposed WWT facilities at this time. Page Three g. Possible toxic impacts to surface waters: Information contained in the files of this office indicates that this facility is in compliance with it's toxicity testing requirements. h. Pretreatment Program (POTWs only): N/A 2. Residuals handling and utilization/disposal scheme: Residuals are currently land filled at the JMN private landfill. PPG has a non -discharge permit for the land application of residuals (W00001055), however, no residuals have ever been applied. Treatment plant classification: Class IV (no change from previous rating) 4. SIC Code(s): 3229 (PPG), 3083 (Azdel) Wastewater Code(s) Primary: 64 Secondary: 02, 73, 15, 14, 36 Main Treatment Unit Code: 01602 PART III - OTHER PERTINENT INFORMATION Is this facility being constructed with Construction Grant Funds or are any public monies involved (municipals only)? No public monies were involved in the construction of this facility. 2.. Special monitoring or limitations (including toxicity) requests: None at this time. 3. Important SOC, JOC or Compliance Schedule dates: N/A 4. Alternative Analysis Evaluation: Spray Irrigation: Insufficient area Connection to Regional Sewer System: There is none presently available to serve this site. Subsurface: Insufficient area 5. Air quality and/or groundwater concerns or hazardous materials utilized at this facility that may impact water quality, air quality, or groundwater: No GW concerns at this time. The facility has obtained the necessary air quality permits. There are no known hazardous materials concerns. PART IV - EVALUATION AND RECOMMENDATIONS The permittee, PPG Industries, Inc., has applied for permit renewal. The WWTP serves the industrial and domestic needs for PPG and a nearby company; Azdel, Inc.. Azdel is located on the PPG property and uses the fiberglass produced at PPG in part of their industrial process. Azdel contributes = 10,000 gpd to the PPG WWTP. Outfall 001 is the outfall from the WWTP that treats the industrial, domestic, some of the stormwater from the two sites, and at this time all non -contact cooling wastewater. Outfall 002 consists of non -contact cooling water and stormwater. Page Four In late August 2002, PPG submitted a request to conduct a pilot study whereby the effluent from its WWT facility would be recycled back into the non -contact process water treatment system. The reason for the study was due to an ongoing drought that had severely affected the amount of water available to the City of Shelby which is where PPG obtains its process water. The pilot study would help determine whether or not the recycling of PPG's WWTP effluent would be acceptable to use in its non - contact cooling water process. It was PPG's intention that if the resulting data from the pilot study indicated no detrimental effects as a result of the reuse of this water, the company would request that the subject permit be amended to include the reuse of treated effluent. An approval letter was sent to the company on August 5, 2002 authorizing the pilot study. Based on the results of the study, PPG has found that the recycling of up to 100% of their effluent to be a beneficial reuse of their wastewater, and they have requested that language be added to their permit that allows this activity to continue. PPG also would like to have the option of installing a filtration system on the non -contact process water waste stream to filter the recycled waste water prior to its use. Should there be any need to discharge any of this non -contact process water it would be routed back to the WWTP for recycling. Based on the information provided, this Office has no objection to this request and recommends that the necessary language be included in the permit permanently authorizing this activity. PPG has also obtained coverage under SW general permit number NCG070015, which contains outfalls, 003, 004, 005, 006, 007, and 008. Prior to reissuance of the subject NPDES permit, the staff of the NPDES Unit should consider combining the two (2) permits for simplicity's sake, and to eliminate any confusion that may arise between the two NPDES permits. Based on the WWT facilities that are available, PPG should be able to continue to meet the existing and proposed permit effluent limitations, provided there are no significant changes in the current waste stream. It is recommended that the permit be renewed as requested. Signature of report preparer Date Water Quality gional Supervisor ^� Date h:\dsr\dsr03\PPg.sr PPG Industries Fiber Glass Products, Inc. 940 Washburn Switch Road Shelby, NC 28150 Todd Winn Associate Engineer, Environmental Fiber Glass Products February 20, 2003 Via Certified Mail — Return Receipt Requested Mrs. Valery Stephens NC DENR / Water Quality / Point Source Branch 1617 Mail Service Center Raleigh, NC 27699-1617 704-434-2261 ext. 359 Fax 704-434-0792 tvdnn@ppg.corn Subject: NPDES Wastewater Permit Renewal Application for Permit Number NC0004685 PPG Industries Fiber Glass Products, Inc. — Shelby Facility Mrs. Stephens: The Shelby plant of PPG Industries Fiber Glass Products, Inc. (PPG) currently operates under NPDES Wastewater Permit Number NC0004685 which expires on August 31, 2003. Enclosed is a renewal application for this permit along with the two required photocopies. The application package contains the following information: o Introduction and points of clarification ❑ Changes since the last permit application ❑ Sludge Management Narrative ❑ EPA Form 1 (General Information Form) ❑ EPA Form 2C (Major Industrial Existing Manufacturing Form) o Outfall Schematics ❑ Topographical maps With this application PPG also hereby requests a minor permit modification to allow the option to use recycled effluent in the non -contact process water system, as described in the enclosed application. Since this is a renewal for an existing permit with a minor permit modification, there is no application fee required nor enclosed. Should you have any questions regarding the following application, please contact me at 704434-2261 ext. 359. Sincerely, Todd Winn Environmental Engineer cc w/ enclosures: WWTP P. Pride — Lexington File FEB 2 5 2003 - NPDES Pertnit No. NC0004685 Renewal Application PPG Industries Fiber Glass Products, Inc. -- Shelby, North Carolina 2/19/2003 Page 1 of 4 INTRODUCTION PPG Industries Fiber Glass Products, Inc. (PPG) operates a Fiber Glass manufacturing facility in Shelby, North Carolina. This facility operates under the existing NPDES Wastewater Permit Number NC0004685 which expires on August 31, 2003. This permit allows the facility to discharge treated wastewater at 1.3 million gallons/day to outfall 001 and to discharge non - contact cooling water to outfall 002. In addition to PPG's Fiber Glass Manufacturing operation, an Azdel, Inc. sheet laminate manufacturing facility is located adjacent to the PPG site and discharges approximately 10,000 gallons per day to the PPG wastewater treatment plant for treatment. Wastewater from PPG and Azdel operations are sent to PPG's wastewater plant for treatment and both operations are covered under this existing permit. This application package is for renewal of the existing permit. PPG is also hereby requesting a minor permit modification to allow the option to use recycled effluent in the non -contact process water system as described in this application's section entitled "Changes Since the Last Permit Application". Additional detail and clarification for several items relevant to this permit application are highlighted below. 1. SIC Codes and Outfall 001 Testing The SIC code for the Azdel, Inc. sheet laminate facility is 3083. The Azdel site discharges 10,000 gallons wastewater per day to the PPG wastewater treatment plant for treatment. This discharge makes up approximately 1/I00w of PPG's wastewater flow. Therefore, as required for the 3083 SIC code, PPG performed volatile compound testing on outfall 001. Results from this testing are incorporated into Form 2C of this application. 2. Primary Outfall (002) Testing Outfall 002, the primary stormwater outfall, is currently permitted for the discharge of non -contact cooling water. Therefore, PPG conducted the testing as set forth in form 2C. This testing also included the required volatile compounds for SIC code 3083. 3. Wet Weather Only Outfalls Outfalls 003, 004, 005, 006, 007 and 008 are covered under the General Stormwater Permit # NCG070000, Certificate of Coverage # NCG070015. These outfalls are wet weather outfalls only and would contain little, if any, drainage from industrial areas. Testing was not conducted on these wet - weather outfalls. NPDES Permit No. NC0004685 Renewal Application PPG Industries Fiber Glass Products, Inc. -- Shelby, North Carolina 2/19/2003 Page 2 of 4 4. EPA Facility ID Number As verbally instructed by NC DENR Water Quality Point Source Branch, the EPA Facility ID number was left blank on all forms because a number has not been assigned to the PPG Shelby facility. 5. Sample Reporting and Averaging Sample reporting and averaging was provided in Form 2C as per NC DENR DWQ's "Directions for Completing Monthly Monitoring Reports" dated September 1, 2000. These instructions provide guidelines with respect to rules for reporting and averaging less than detectable "<" values. (e.g., a sample result with a value of less than the detectable limit is considered to equal "zero" when calculating monthly and long-term arithmetic averages). Also per NC DENR DMR reporting guidelines, fecal coliform monthly and long-term averages were calculated using a geometric mean. 6. Signature Authority There will be no change requested in signature authority for monthly monitoring report requirements. Signature authority for monthly monitoring reports as a "Duly Authorized Representative" per 15A NCAC 2B.0506(b)(2)(D), will remain unchanged and is delegated to the person holding the title of Environmental Engineer. NPDES Permit No. NC0004685 Renewal Application PPG Industries Fiber Glass Products, Inc. -- Shelby, North Carolina 2/19/2003 Page 3 of 4 CHANGES SINCE THE LAST PERMIT APPLICATION The wastewater treatment facility has undergone the following change since the last permit application was submitted. As of August 7, 2002, the facility began recycling treated effluent as non -contact process cooling water. This change was initiated per the request from the City of Shelby, asking that industrial users reduce their city water consumption by 25% due to the local drought conditions experienced in 2002. On August 6, 2002 PPG requested permission from NC DENR Division of Water Quality, Mooresville Regional Office, to conduct a Pilot Study to recycle treated effluent into the non -contact process water systems. PPG was granted permission to conduct this study on August 7, 2002 by Rex Gleason, Water Quality Regional Supervisor (Mooresville). The study successfully resulted in a conservation of city water usage. In this permit application, PPG hereby requests that the new NPDES permit be modified to allow the option to use recycled effluent in the non -contact process water system. The following allowable operating options are requested to be incorporated into the new permit: 1) Incorporate into the permit the option to recycle up to 100% of the wastewater treatment plant effluent, without further treatment, as non - contact process water, and 2) Also continue to allow the facility to discharge up to 100% of the wastewater treatment plant effluent to Outfall 001 (without recycling water to the non -contact process water system). 3) Allow the option to install a filtration system, if desired, on the non - contact process water system, to filter the intake of the recycled water. The requested modification to allow the option to use recycled effluent in the non -contact process system does not affect any of the following: 1) It does not increase the volume of the facility's final wastewater effluent. 2) It does not affect the existing permitted constituents or effluent limits. NPDES Permit No. NC0004685 Renewal Application PPG Industries Fiber Glass Products, Inc. -- Shelby, North Carolina 2/19/2003 Page 4 of 4 SLUDGE MANAGEMENT PLAN NARRATIVE The wastewater treatment plant (WWTP) sludge generated by the Shelby facility is a mixture of both primary and secondary sludges. The primary sludge is the result of clarification using lime, aluminum chloride, polymers and coagulants to achieve floc formation and settling. The secondary sludge is waste activated sludge from the biological treatment system. The secondary sludge also contains bentonite clay and a small amount of ferric chloride. Both sludges are combined in a sludge thickener/storage tank prior to dewatering. Polymer addition and mechanical mixing, along with dilution water, are required to prepare the sludge for the belt press. The sludge is then pumped to the belt press for dewatering. The belt press has both a gravity drain section and a pressure section where the water is removed. Typically, the solids are increased from 4-5% as it leaves the storage tank, to 25-30% solids as discharged from the belt press. The dewatered sludge is transported via screw conveyors to a roll -off box. The water is routed back to the head of the W WTP. Before the roll -off box is picked up for disposal, a paint filter test is conducted on the sludge to ensure that free liquids are not present. The dewatered sludge is then taken to a permitted, lined landfill for disposal. EPA FORM 2C SECTION II.A. OUTFALL 001 SCHEMATIC PPG INDUSTRIES FIBER GLASS PRODUCTS, INC. asearch Misc. Sanitary 1,000 3,000 60,000 gpd gpd gpd Stormwater Garage/Pads (185,000 gpd) 1" rainfall AZDEL SIC CODE #3083 —10,000 gpd Dewatering 33,250 gpd Supply 1,500,000 gpd Boilers Misc Process Fabrication 43,000 Water 15,000 gpd 75.000 gpd gpd WWTP (see WVVTP Schematic) OUTFALL #001 up to 1.3 MGD Forming 850,000 gpd Evaporation 335,000 gpd Product 1,300 gpd EPA FORM 2C SECTION II.B. W WTP TREATMENT / OUTFALL 001 SCHEMATIC PPG INDUSTRIES FIBER GLASS PRODUCTS, INC. NPDES PERMIT NC0004686 RENEWAL APPLICATION 0.06 MGD UAH FLASH MIX PRIMARY SCREENON "77 TANK CLARIFIERS 0.12 MGD 1" 1-T 1 1-U 0.01 MGD Anionic Polymer sludge to Cationic Coagulant thickener OUTFALL ABW SAND SECONDARY AERATION #001 FILTRATION CLARIFIERS (3) TANKS (2) 4-A 1-V 2-C,1-U 3-A RECYCLE / FeCla Lime COOLING Defoamer WATER Anionic H2POe 4-C Polymer SLUDGE PROCESS SCHEMATIC THICKENER 5-L BELT PRESS 5-E, 1-0, 5-C Water Water sludge tc to head of Landfill WWTP 5-0 4-C ) ( sludge to thickener RAS to Aeration Treatment Codes Used from Table 2C-1 1-G Flocculation 1-L Grinding (Comminutors) 1-O Mixing 1-T Screening 1-U Sedimentation (Settling) 1-V Sand Filtration 2-C Chemical Precipitation 2-D Coagulation 3-A Activated Sludge 4-A Discharge to Surface Water 4-C Re -Use / Recycle of Effluent 5-C Belt Filtration 5-E Chemical Conditioning 5-L Gravity Thickening 5-Q Landfill Bentonile Clay EPA FORM 2C SECTION II.A. OUTFALL 002 SCHEMATIC PPG INDUSTRIES FIBERGLASS PRODUCTS, INC. City Water Supply 98.6 acres Cooling up to 115,000 peak flow = gpd Underground Spring est 35.000 clod OUTFALL 4002 up to 150,000 gpd + stormwater water discharges from this outfall are permitted under NPDES Permit NC0004685 Discharges are covered under the General Stormwater Discharge Permit #NC070000, COC #:NCG070015 Stornwater Peak flow was calculated using the Rational Method (Q = CIA) where: a = peak flow (cfs) = runoff coefficient (where:.9 = impermeable, .8 = graveled, .3 = grassed, .1 = wooded) = intensity 4 = area (acres) : the above peak flow for stormwater was calculated using an intensity of 17hr. runoff coefficient (C) used was 0.76 based on the following estimate: 80% industrial (.9), 10% grassed (3), 10% led (1) EPA FORM 2C SECTION II.A. OUTFALL 003, 004, 005, 006. 007 & 008 SCHEMATIC PPG INDUSTRIES FIBER GLASS PRODUCTS, INC. Stormwater Stormwater Stormwater Stormwater Stormwater Stormwater 30.8 acres 3.1 acres 2.7 acres 9.0 acres 33.8 acres 2.6 acres O utfa I I O utfa I I O utfa I I O utfa I I O utfa I I IF O utfa I I #003 #004 #005 #006 #007 #008 Peak flow Peakw Peakw Peakw Peak flow Pw 1 2 9 cfs 2.3 cfs1 3 cfs cfs cfs 0.9 cfs are COC #:NCG070015. areas contain limited drainage from industrial areas of the property. Outfall 002 is the primary Stormwater discharge point industrial portions of the property. Peak Flows were calculated using the Rational Method (Q = CiA) where: D = peak flow (cfs) .. = runoff coefficient (where: .9 = impermeable, .8 = graveled, .3 = grassed, .1 = wooded) = intensity 4 = area (acres) the above peak flows were calculated using an intensity of 1'7hr. See table below for runoff coefficient calculations. RUNOFF COEFFICIENT CALCULATIONS OUTFALL C 003 0.42 20% industrial (.9), 80% grassed (.3) 004 0.75 90% paved parking lot (.9) and 10% grassed (.3) 005 0.48 30% paved parking lot (.9) and 70% grassed (.3) 006 0.31 95% lawn (.3), 2.5% wooded (.1), 2.5% graveled (.8) 007 0.36 10% industrial (.9) and 90% grassed (.3) 008 0.36 10% industrial (.9) and 90% grassed (.3)